Patent GB-428160-A (GB)
Title: Improvements in or relating to products containing derivatives of cellulose
IPC: C08K5/103
Filed: 1934-04-24
Abstract: The esters of di- or poly-olefine glycols (or their partial ethers) with hydroxy carboxylic acids containing 2--4 carbon atoms in the molecule inclusive of the carbon atoms in the carboxy groups, are employed as plasticizers for cellulose derivatives in the manufacture of plastic compositions, moulding powders, artificial filaments, films and sheets, lacquers &c.  Suitable hydroxy carboxylic acids are lactic, hydroxy butyric, tartaric and citric acids; and the plasticisers may also contain on the one hand radicles of other acids such as benzoic, naphthoic, propionic, butyric, stearic, phthalic, malonic succinic and trimesic acids, and on the other hand methyl, ethyl or aromatic groups, or residues of simple glycols or their partial ethers. The cellulose derivative may be nitrocellulose, an organic ester of cellulose, or a cellulose ether.  The esters above referred to may be used alone or in conjunction with other plasticizers such as triacetin, dibenzyl tartrate, diethyl tartrate, dibutyl tartrate, diethyl phthalate and monomethyl ethylene glycol phthalate; and the following are suitable solvents:--acetone, methyl acetate, ethylene formal, ethyl lactate, formal glycerol and diacetone alcohol.  The esters are prepared by esterification between the acid with or without sulphuric acid or other catalyst, or the anhydride or acid chloride of the acid, and the polyglycol &c.  The Specification as open to inspection under Sect. 91 refers generally to the use of esters made from hydroxy carboxylic acids containing at least three carbon atoms.  This subject-matter does not appear in the Specification as accepted.ALSO:The esters of di- or poly-olefine glycols (or their partial ethers) with hydroxy carboxylic acids containing 2--4 carbon atoms in the molecule exclusive of the carbon atoms in the carboxy groups, are employed as plasticizers for cellulose derivatives in the manufacture of lacquers &c.  Suitable hydroxy carboxylic acids are lactic, hydroxy butyric, tartaric and citric acids; and the plasticizers may also contain on the one hand radicles of other acids such as benzoic, naphthoic, propionic, butyric, stearic, phthalic, malonic, succinic and trimesic acids, and on the other hand methyl, ethyl or aromatic groups, or residues of simple glycols or their partial ethers.  The cellulose derivative may be nitrocellulose, an organic ester of cellulose or a cellulose ether.  The esters above referred to may be used alone or in conjunction with other plasticizers such as triacetin, dibenzyl tartrate, diethyl tartrate, dibutyl tartrate, diethyl phthalate, and monomethyl ethylene glycol phthalate; and the following are suitable solvents: acetone, methyl acetate, ethylene formal, ethyl lactate, formal glycerol and diacetone alcohol.  The Specification as open to inspection under Sect. 91 refers generally to esters made from hydroxy carboxylic acids containing at least three carbon atoms. This subject-matter does not appear in the Specification as accepted.ALSO:The esters of di- or poly-olefine glycols (or their partial ethers) with hydroxy carboxylic acids containing 2-4 carbon atoms in the molecule exclusive of the carbon atoms in the carboxy groups, are employed as plasticizers for cellulose derivatives in the manufacture of plastic compositions, moulding powders, &c. Suitable hydroxy carboxylic acids are lactic, hydroxy butyric, tartaric and citric acids; and the plasticizers may contain on the one hand radicles of other acids such as benzoic, naphthoic, propionic, butyric, stearic, phthalic, malonic, succinic and trimesic acids, and on the other hand methyl, ethyl or aromatic groups, or residues of simple glycols or their partial ethers. The cellulose derivative may be nitrocellulose, an organic ester of cellulose, or a cellulose ether.  The esters above referred to may be used alone or in conjunction with other plasticizers such as triacetin, dibenzyl tartrate, diethyl tartrate, dibutyl tartrate, diethyl phthalate, and monomethyl ethylene glycol phthalate; and the following are suitable solvents: acetone, methyl acetate, ethylene formal, ethyl lactate, formal glycerol and diacetone alcohol.  The Specification as open to inspection under Sect. 91 refers generally to the use of esters made from hydroxy carboxylic acids containing at least three carbon atoms. This subject-matter does not appear in the Specification as accepted.